首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper
admin
2015-10-26
28
问题
Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper at a point closest to the moon and also at a point farthest from the moon, on the opposite side of the earth. These two tidal "waves" follow the apparent movement of the moon around the earth and strike nearly every coast line at intervals of about twelve hours and twenty-five minutes. After reaching a high point, the water level goes down gradually for a little more than six hours and then begins to rise towards a new high point. Hence, most coast lines have two tides a day, and the tides occur fifty minutes later each day. Differences in the coast line and in channels in the ocean bottom may change the time that the tidal wave reaches different points along the same coast line. The difference in water level between high and low tide varies from day to day according to the relative positions of the sun and the moon because the sun also exerts a pull on the earth, although it is only about half as strong as the pull of the moon. When the sun and the moon are pulling along the same line, the tides rise higher, and when they pull at right angles(直角)to one another, the tide is lower. The formation of the coast line and variations in the weather are additional factors which can affect the height of tides. Some sections of the coast are shaped in such a way as to cause much higher tides than in other areas. A strong wind blowing towards the shore may also cause tides to be higher.
Which of the following may be concluded from the information presented in the passage?
选项
A、Some coast lines do not have two tides each day.
B、Tides usually rise to the same level day after day.
C、Tides are not affected by the shape of coast line.
D、The sun has as much effect on tides as does the moon.
答案
A
解析
根据文章中的第5句“因此,大部分海岸线每天有两次潮汐,而且潮汐涌来的时间每天落后50分钟”,因此,不难推断出有些海岸线不是每天有两次潮汐。
转载请注明原文地址:https://kaotiyun.com/show/VjQi777K
0
在职申硕(同等学力)英语
相关试题推荐
Asagoodphotographer,youmustdevelopanawarenessoftheworldaroundyouandthepeoplewho______it.
Accordingtothepassage,thevolunteers______.TherearemoreolderpeoplewhowanttodoVSObecause______.Ⅰ.morepeoplet
Whatisthepassagemainlyabout?Whichofthefollowinghasbeendonebytheauthorhimself?
Nothingissouncertainasthefashionmarketwhereonestyle______overanotherbeforebeingreplaced.
Weare(at)acriticalpointinournation’shistoryandwecannotgobackasindividualsor(asacountry)to(what).weweret
TheAmericans______GeorgeWashingtonasthefatheroftheircountry.
The"standardofliving"ofanycountrymeanstheaverageperson’sshareofthegoodsandserviceswhichthecountryproduces.A
The"standardofliving"ofanycountrymeanstheaverageperson’sshareofthegoodsandserviceswhichthecountryproduces.A
随机试题
有关胸膜腔内压的叙述,下列哪项不正确()
广告目标按照对应的产品生命周期大体可以分为()
行政诉讼的执行中,申请人提出执行申请的期限为
先天性卵巢发育不全综合征正确的是
刘家村在本村“四荒”土地发包过程中的下列哪种做法不符合《土地承包法》的规定?
设则φ’(x)=()。
操行评语又称品行鉴定,是对在校生的政治、思想、学习工作等情况进行综合考查评定所做的评语,操行评语只能由班主任来写。()
教师是教育工作的组织者、领导者,在教育过程中______。
运算符重载时不需要保持的性质是()。
下列描述中正确的是
最新回复
(
0
)